The Islamic State group claimed responsibility Wednesday for a pair of stunning attacks on Iran’s parliament and the tomb of its revolutionary leader, Ayatollah Ruhollah Khomeini, which killed at least 12 people and wounded more than 40. Tehran Police Chief Gen. Hossein Sajedinia announced late Wednesday night that five suspects had been detained for interrogation, according to a report in the semi-official ISNA news agency. Sajedinia did not offer any further details.